definitions.py

from egoist.app import App, SettingsDict

settings: SettingsDict = {"rootdir": "cmd/", "here": __file__}
app = App(settings)

app.include("egoist.directives.define_cli")


@app.define_cli("egoist.generators.clikit:walk")
def hello(*, name: str, age: int = 20, who: str = "foo") -> None:
    """hello message"""
    from egoist.generators.clikit import runtime, clikit

    options = runtime.get_cli_options()
    options.name.help = "the name of target person"
    options.age.help = "age of subject"
    options.who.help = "name of subject"

    with runtime.generate(clikit) as m:
        hello_pkg = m.import_("m/internal/hello")
        m.stmt(hello_pkg.Hello(name, age, who))  # m.stmtを忘れずに


if __name__ == "__main__":
    app.run()

go.mod

module m

go 1.14

hello.go

package hello

import "fmt"

// Hello ...
func Hello(name string, age int, who string) {
	fmt.Printf("%s(%d): hello %s\n", who, age, name)
}

main.go

package main

import (
	"flag"
	"fmt"
	"os"
	"log"
	"m/internal/hello"
)

// this file is generated by egoist.generators.clikit

// Option ...
type Option struct {
	Name string // for `-name`
	Age int // for `-age`
	Who string // for `-who`
	Args []string // cmd.Args
}


func main() {
	opt := &Option{}
	cmd := flag.NewFlagSet("hello", flag.ContinueOnError)
	cmd.Usage = func() {
		fmt.Fprintln(cmd.Output(), `hello - hello message`)
		fmt.Fprintln(cmd.Output(), "")
		fmt.Fprintln(cmd.Output(), "Usage:")
		cmd.PrintDefaults()
	}
	cmd.StringVar(&opt.Name, "name", "", "the name of target person")
	cmd.IntVar(&opt.Age, "age", 20, "age of subject")
	cmd.StringVar(&opt.Who, "who", "foo", "name of subject")

	if err := cmd.Parse(os.Args[1:]); err != nil {
		if err != flag.ErrHelp {
			cmd.Usage()
		}
		os.Exit(1)
	}
	opt.Args = cmd.Args()
	if err := run(opt); err != nil {
		log.Fatalf("!!%+v", err)
	}
}

func run(opt *Option) error {
	hello.Hello(opt.Name, opt.Age, opt.Who)
	return nil
}

Makefile

gen:
	python definitions.py generate

structure.txt

.
├── Makefile
├── cmd
│   └── hello
│       └── main.go
├── definitions.py
├── go.mod
├── internal
│   └── hello
│       └── hello.go
└── structure.txt

4 directories, 6 files